Improve building process

Runtime/LLMBuilder.cs

@@ -16,6 +16,7 @@ public class LLMBuilder
     {
         static List<StringPair> movedPairs = new List<StringPair>();
         public static string BuildTempDir = Path.Combine(Application.temporaryCachePath, "LLMUnityBuild");
+        public static string androidPluginDir = Path.Combine(Application.dataPath, "Plugins", "Android", "LLMUnity");
         static string movedCache = Path.Combine(BuildTempDir, "moved.json");
 
         [InitializeOnLoadMethod]
@@ -86,7 +87,10 @@ public static void MovePath(string source, string target)
         /// <param name="path">path</param>
         public static bool DeletePath(string path)
         {
-            if (!LLMUnitySetup.IsSubPath(path, LLMUnitySetup.GetAssetPath()) && !LLMUnitySetup.IsSubPath(path, BuildTempDir))
+            string[] allowedDirs = new string[] { LLMUnitySetup.GetAssetPath(), BuildTempDir, androidPluginDir};
+            bool deleteOK = false;
+            foreach (string allowedDir in allowedDirs) deleteOK = deleteOK || LLMUnitySetup.IsSubPath(path, allowedDir);
+            if (!deleteOK)
             {
                 LLMUnitySetup.LogError($"Safeguard: {path} will not be deleted because it may not be safe");
                 return false;
@@ -167,6 +171,15 @@ public static void HideLibraryPlatforms(string platform)
                     }
                 }
             }
+
+            if (platform == "android")
+            {
+                string source = Path.Combine(LLMUnitySetup.libraryPath, "android");
+                string target = Path.Combine(androidPluginDir, LLMUnitySetup.libraryName);
+                MoveAction(source, target);
+                MoveAction(source + ".meta", target + ".meta");
+                AddActionAddMeta(androidPluginDir);
+            }
         }
 
         /// <summary>

Runtime/LLMCharacter.cs

@@ -106,7 +106,7 @@ public class LLMCharacter : LLMCaller
         /// <summary> option to set the number of tokens to retain from the prompt (nKeep) based on the LLMCharacter system prompt </summary>
         public bool setNKeepToPrompt = true;
         /// <summary> the chat history as list of chat messages </summary>
-        public List<ChatMessage> chat;
+        public List<ChatMessage> chat = new List<ChatMessage>();
         /// <summary> the grammar to use </summary>
         public string grammarString;
 
@@ -161,7 +161,7 @@ public override bool IsValidLLM(LLM llmSet)
 
         protected virtual void InitHistory()
         {
-            InitPrompt();
+            ClearChat();
             _ = LoadHistory();
         }
 
@@ -204,25 +204,14 @@ public virtual string GetCacheSavePath(string filename)
             return GetSavePath(filename + ".cache");
         }
 
-        protected virtual void InitPrompt(bool clearChat = true)
+        /// <summary>
+        /// Clear the chat of the LLMCharacter.
+        /// </summary>
+        public virtual void ClearChat()
         {
-            if (chat != null)
-            {
-                if (clearChat) chat.Clear();
-            }
-            else
-            {
-                chat = new List<ChatMessage>();
-            }
+            chat.Clear();
             ChatMessage promptMessage = new ChatMessage { role = "system", content = prompt };
-            if (chat.Count == 0)
-            {
-                chat.Add(promptMessage);
-            }
-            else
-            {
-                chat[0] = promptMessage;
-            }
+            chat.Add(promptMessage);
         }
 
         /// <summary>
@@ -234,7 +223,8 @@ public virtual void SetPrompt(string newPrompt, bool clearChat = true)
         {
             prompt = newPrompt;
             nKeep = -1;
-            InitPrompt(clearChat);
+            if (clearChat) ClearChat();
+            else chat[0] = new ChatMessage { role = "system", content = prompt };
         }
 
         protected virtual bool CheckTemplate()
@@ -585,7 +575,7 @@ public virtual async Task<string> Load(string filename)
             }
             string json = File.ReadAllText(filepath);
             List<ChatMessage> chatHistory = JsonUtility.FromJson<ChatListWrapper>(json).chat;
-            InitPrompt(true);
+            ClearChat();
             chat.AddRange(chatHistory);
             LLMUnitySetup.Log($"Loaded {filepath}");